Microwave Solutions MDU2750L MDU2750L Motion Detector Unit User Manual August 11 2009

Microwave Solutions Ltd. MDU2750L Motion Detector Unit August 11 2009

User manual

MDU2750L User Manual.doc Page 1
USER MANUAL
MDU2750L
FCC-ID: ROO-MDU2750L
IC: 10829A-MDU2750L
Description
The Microwave Solutions MDU2750L Motion Detector Unit is an X-
Band microwave transceiver that utilises the Doppler shift
phenomenon to "sense" motion. The unit, contained in a lightweight
metal housing, features a dielectric resonator stabilised FET oscillator,
which provides stable operation over a broad temperature range in
either CW or low duty cycle pulse mode and a balanced mixer for
enhanced sensitivity and reliability.
The basic principle of operation consists of detecting the frequency
shift between a transmitted and a received signal reflected back from
a moving object within the field of view of the unit. The unit produces
a low level output signal which can be amplified and processed to
provide an audible or visual alarm signal. The MDU2750L employs
low cost surface mount manufacturing techniques which are field
proven as being rugged and reliable.
Absolute Maximum Ratings
Parameter
Symbol
Rating
Units
Comment
Supply Voltage
VCC
+5.25
V
Operating Temperature
TOP
-40 to +70
°C
Performance level not guaranteed
Storage Temperature
TSTG
-40 to +80
°C
Electrical Characteristics
Parameter
Symbol
Min.
Typ.
Units
Comment
Transmit Frequency
fT
10.500
10.525
GHz
Pre-set during manufacture.
Temperature Stability
∆f
MHz
Over TOP range below
Output Power
POUT
12
dBm
EIRP
Antenna Beamwidth
72
°
-3dB, horizontal with tab down
36
°
-3dB, vertical with tab down
IF Output Offset
VDC
-150
0
mV
Into free space
Sensitivity
-83
dBm
10dB S/N ratio
Noise
µV
In 3Hz – 80Hz bandwidth
Supply Voltage
VCC
4.75
5.00
V
Supply Current
ICC
22
mA
Pulse Width
5
µs
Min. duty cycle – 1%
Operating Temp
TOP
-20
°C
Full specification compliance
MDU2750L User Manual.doc Page 2
Coverage Patterns
Connections & Mechanical Outline
Handling Precautions
The MDU2750L is sensitive to damage from ESD.
Normal precautions as usually applied to CMOS devices are sufficient when handling
the module.
Touching the connection points should be avoided before soldering the module into circuit.
Using a multimeter (e.g. for resistance measurement) between any of the connection
points may cause damage to the module.
Certification
Microwave Solutions Ltd. has established and maintains a Quality System that has been audited by BSI and holds ISO
9001:2008 approval under certificate FM56058.
The MDU2750L complies with the requirements of the RoHS Directive European Union Directive 2011/65/EU and with
the requirements of the REACH Regulations EC 1907/2006.
MDU2750L User Manual.doc Page 3
OEM Responsibilities
Manufacturers of mobile or fixed devices incorporating MDU2750L modules are authorized to use the FCC Grants and
IC Certificates of the MDU2750L modules for their own final products under the conditions referenced in this
document. It is the responsibility of the manufacturer of the final product to ensure that the MDU2750L module is
operated within the approved conditions shown below. If the FCC/IC label of the module is not visible when the
module is installed inside the final product then the outside of the final product must also display a label stating
"Contains FCC ID: ROO-MDU2750L" and "Contains IC: 10829A-MDU2750L".
Approved Operating Conditions to meet FCC/IC requirements
The MDU2750L module can be operated in full compliance with FCC/IC requirements (depending on the
characteristics of the final product) under the following conditions:
1) The power supply voltage provided to the module (at the module terminals) must be maintained within the
specified range of +5 ± 0.25 volts under all conditions of AC line voltage irregularities, battery voltages,
ambient temperatures and worst case load conditions.
2) If the module is operated under pulsed conditions, the rise and fall times of the power pulse shall be less
than 1 µs and, during the pulse, the power supply voltage shall be maintained within the limits of 1) above
under all conditions.
3) A minimum separation distance of 1.2cm is required between the user and the module when operating at
100% duty cycle.
4) If the final product is designed for use in any situation except in motor vehicles or on aircraft the module can
be operated with any duty cycle up to and including 100%.
5) If the final product is designed for use in motor vehicles or on aircraft, the module can be operated
continuously with a maximum duty cycle of 25.8% (averaged over 100ms) or with any duty cycle up to and
including 100% (averaged over 100ms) if the final product includes features to prevent continuous operation
(as defined in the FCC Rules and Industry Canada Standards).
FCC and Industry Canada statements:
This device complies with Part 15 of the FCC Rules and Industry Canada licence-exempt RSS standard(s).
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired
operation.
This device may only be operated using the approved integral antenna.
This device complies with FCC and Industry Canada radiation exposure limits set forth for an uncontrolled
environment. End users must follow the specific operating instructions for satisfying RF exposure
compliance.
This device must not be co-located or operating in conjunction with any other antenna or transmitter.
Changes or modifications not expressly approved by Microwave Solutions Ltd. may void the user's authority
to operate this equipment
In the event that these conditions or the Approved Operating Conditions above cannot be met, then the FCC
and Industry Canada certifications are no longer considered valid and the FCC ID and IC Certification Number
cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-
evaluating the end product (including the transmitter) and obtaining a separate certification.

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